Stand up and disagree with that behavior with an "uh oh" and redirect her away from the other dog - over and over and over until she gets it. Then, just watch for body language and say "uh oh" before she goes after her.
Or, you can remove her from the room every time she starts to attack - that takes a lot of walking her out of the room, etc.
Before long, just a look from you with a "sshhh" sound should get your point across.
__________________ Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |